// Returns true if current browser is Netscape.
function isNS() {
	var name = navigator.appName;
    return (name.substring(0,1) == 'N');
}

// Returns true if current platform is Macintosh.
function isMac() {
	var version = navigator.appVersion;
	return (version.indexOf("Mac") >= 0);
}
function IEWindows()
{
	var name = navigator.appName;
	if (name.substring(0,1) == 'M')
	{
		var version = navigator.appVersion;
		return (version.indexOf("Windows") >= 0);		
	}
	else return false;
}